Two-degree-of-freedom multi-channel high-pressure visual swing test device and method

Abstract

The invention discloses a two-degree-of-freedom multi-channel high-pressure visual swing test device and method, and relates to the technical field, and the device comprises a frame, and the bottom of the frame is provided with a moving assembly; the transparent water storage cavity is fixedly connected to the frame; the lifting mechanism comprises lifting columns symmetrically and fixedly connected to the two sides of the frame, lifting assemblies are mounted on the lifting columns, and a mounting beam is arranged between the two lifting assemblies; the back plate is mounted on the mounting beam through a horizontal displacement assembly; a plurality of groups of reaction kettles are arranged, the plurality of groups of reaction kettles are rotationally connected to the back plate through swinging connecting assemblies, and a plurality of groups of vertical swinging assemblies are mounted on the back plate; the vacuum unit is mounted at the top of the back plate; and the temperature control device is mounted on one side of the frame. Rich samples are provided for test analysis, the working efficiency of scientific research and detection is effectively improved, and the time cost of multiple groups of tests is reduced.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a dual-degree-of-freedom multi-channel high-pressure visual swing test device and method. Background Technology

[0002] In core fields such as petrochemicals, aerospace, and new energy, various equipment and media often operate under complex conditions of high pressure, variable temperature, and dynamic oscillation. Their operational stability, media reaction characteristics, and material weather resistance directly determine product safety and reliability. Therefore, it is necessary to accurately reproduce actual operating conditions through simulation testing devices to provide data support for product development and performance testing. Currently available testing devices have many limitations and cannot meet the demands for high-precision and high-efficiency testing. Most devices adopt a single-channel design, allowing only one set of tests to be conducted at a time. When facing multi-variable comparative tests, repeated start-ups and shutdowns and parameter adjustments are required, which is not only time-consuming and labor-intensive, but also significantly extends the test cycle and makes data consistency susceptible to environmental fluctuations. Furthermore, their operating condition simulation capabilities are insufficient; most devices can only achieve single-degree-of-freedom oscillation, failing to reproduce the complex postures of equipment during actual operation. Moreover, conditions such as high pressure, vacuum, and variable temperature are difficult to coordinate and control, resulting in significant deviations from actual operating scenarios. In addition, most devices lack visualization functions, making it impossible to observe changes in the internal media and reaction state of the reactor in real time during the test. The process can only be inferred from the final data, leading to insufficient data integrity and reliability. Some devices have fixed structures and no moving components, making it difficult to flexibly adapt to various testing scenarios such as laboratories and field sites. This further restricts the flexibility and breadth of experimental research and fails to meet the high-level needs of various industries for complex working condition simulation tests.

[0003] To address the aforementioned technical issues, this invention provides a dual-degree-of-freedom, multi-channel high-pressure visual swing test device and method. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-degree-of-freedom multi-channel high-pressure visual swing test device and method, which aims to solve or improve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following solution: A dual-degree-of-freedom multi-channel high-pressure visual swing test device includes: A frame, with a movable component mounted at its bottom; A transparent water storage chamber is fixedly connected to the frame. The lifting mechanism includes lifting columns symmetrically and fixedly connected to both sides of the frame, lifting components are installed on the lifting columns, and an installation beam is provided between the two sets of lifting components; A back plate, which is mounted on the mounting beam via a horizontal displacement assembly; The reaction vessel is provided in several groups. The several groups of reaction vessels are rotatably connected to the back plate through a swing connection assembly. The back plate is equipped with several groups of vertical swing assemblies. The several reaction vessels located in the same vertical direction are rotatably connected to the vertical swing assembly through a telescopic drive shaft. A vacuum unit, installed on top of the back plate, is used to evacuate the reactor. A temperature control device is installed on one side of the frame. The transparent water storage cavity is filled with liquid, and the temperature control device is used to control the temperature of the liquid in the transparent water storage cavity.

[0006] According to the dual-degree-of-freedom multi-channel high-pressure visual swing test device provided by the present invention, the reaction vessel is made of sapphire material and protected by stainless steel 316 material on the outside. It has a pressure resistance of 20Mpa and an overall volume of 20ml. A shaking ball is placed inside the reaction vessel.

[0007] According to the dual-degree-of-freedom multi-channel high-pressure visual swing test device provided by the present invention, the vacuum unit consists of a vacuum pump, a moving trolley, a buffer container, a vacuum gauge, and a venting device. The vacuum pump has a vacuuming rate of 50 L / min. The moving trolley is installed on the top of the back plate. The vacuum pump is connected to the reaction vessel through a pipeline.

[0008] According to the dual-degree-of-freedom multi-channel high-pressure visual swing test device provided by the present invention, the moving component includes casters, and there are not less than four sets of casters. The casters are installed at the bottom of the frame, and a brake assembly is provided on the casters.

[0009] A dual-degree-of-freedom, multi-channel high-pressure visual swing test method includes: Disassemble the reactor and clean it three times with deionized water. Then dry the reactor until there is no moisture residue. Then reassemble the reactor according to the experimental requirements and set the water bath temperature to the target experimental temperature. The experiment was conducted at the target experimental temperature using a two-degree-of-freedom multi-channel high-pressure visual swing test device, and relevant parameters were collected in real time. The performance of the inhibitor was evaluated based on the parameter data. The relevant parameters included at least temperature, pressure, and gas flow rate. The evaluation indicators of the inhibitor performance included gas consumption, water conversion rate, induction time, clogging time, and hydrate morphology. After the experiment, the water bath was lowered to allow the reaction vessel to naturally return to room temperature. After the hydrates decomposed, the exhaust valve was opened to release the experimental gases. The vessel was then disassembled and cleaned to restore the experimental setup to its initial state.

[0010] According to the dual-degree-of-freedom multi-channel high-voltage visual swing test method provided by the present invention, the process of conducting the experiment at the target experimental temperature using a dual-degree-of-freedom multi-channel high-voltage visual swing test device specifically includes: Inhibitor solutions of different types and concentrations, as well as blank control solutions, are injected through multiple injection ports of the reactor. Methane gas is introduced into the reactor, and multiple purging and venting operations are performed to remove air. After adjusting the pressure inside the reactor to the target experimental pressure and stabilizing it, the system is sealed. The water bath is controlled to cool the reactor to the target experimental temperature. The two-degree-of-freedom swing mechanism is activated to make the reactor swing vertically and reciprocate horizontally at the same time to simulate the gas-liquid mixing and flow process.

[0011] According to the dual-degree-of-freedom multi-channel high-pressure visual swing test method provided by the present invention, the formula for calculating the gas consumption is as follows: ; in, Let be the number of moles of gas at time t. The initial gas volume, The initial number of moles of gas at the initial moment. The molar mass of water, The density of water, R The gas constant is... Let be the temperature at time t. Let the pressure be at time t. The coefficient of volume expansion is 1. It is the water combination number. Let be the gas compressibility factor at time t.

[0012] ; in, Δn This refers to gas consumption. n0,gas The initial number of moles of gas. nt,gas Let t be the number of moles of gas at time t.

[0013] According to the dual-degree-of-freedom multi-channel high-pressure visual swing test method provided by the present invention, the formula for calculating the water conversion rate is as follows: ; in, WC For water conversion rate, The number of water moles in the hydrate. The initial number of moles of water at the initial moment.

[0014] The present invention discloses the following technical effects: The device is equipped with multiple reaction vessels, which can achieve dual-degree-of-freedom oscillation independently or synchronously through the vertical swing assembly and the telescopic drive shaft, enabling the simultaneous conduct of multiple parallel experiments. Compared to single-channel devices, this significantly shortens the experimental cycle and allows for comparison of data differences under different operating conditions, providing a rich sample for experimental analysis, effectively improving the efficiency of scientific research and testing, and reducing the time cost of multiple experiments.

[0015] The transparent water storage chamber, combined with a temperature control device, allows for precise regulation of the experimental environment temperature. Combined with a vacuum unit, it achieves vacuum conditions in the reactor, accurately reproducing complex operating conditions such as high pressure, temperature variation, and vacuum. The visual design facilitates real-time observation of the reaction process, and the swing function simulates actual operating posture, ensuring that the experimental data closely matches real-world scenarios and improving data reliability.

[0016] The movable components at the bottom of the frame allow the device to be flexibly moved to different sites without the need for fixed installation. The integrated design of each component results in a compact and rationally laid-out structure. Vacuum, temperature control, and other systems work together to adapt to diverse testing needs, including high-pressure, swing, and constant-temperature operations. It can meet the requirements of precise laboratory research as well as on-site simulation testing, making it widely applicable. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The isometric projection of the dual-degree-of-freedom multi-channel high-pressure visual swing test device of the present invention. Figure I ; Figure 2 The isometric projection of the dual-degree-of-freedom multi-channel high-pressure visual swing test device of the present invention. Figure II .

[0019] The components include: 1. Frame; 2. Casters; 3. Transparent water storage chamber; 4. Lifting mechanism; 5. Back panel; 6. Reactor. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a dual-degree-of-freedom multi-channel high-pressure visual swing test device and method, which aims to solve or improve at least one of the above-mentioned technical problems.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-2 As shown, the present invention provides a dual-degree-of-freedom multi-channel high-pressure visual swing test device, comprising: Frame 1, with a movable component mounted at its bottom; A transparent water storage cavity 3 is fixedly connected to the frame 1; The lifting mechanism 4 includes lifting columns symmetrically and fixedly connected to both sides of the frame 1. Lifting components are installed on the lifting columns, and an installation beam is provided between the two sets of lifting components. Back plate 5, which is mounted on the mounting beam via a horizontal displacement assembly; The reaction vessel 6 is provided in several groups. The several groups of reaction vessels 6 are rotatably connected to the back plate 5 through a swing connection assembly. The back plate 5 is equipped with several groups of vertical swing assemblies. The several reaction vessels 6 located in the same vertical direction are rotatably connected to the vertical swing assembly through a telescopic drive shaft. A vacuum unit is installed on top of the back plate 5 and is used to evacuate the reactor 6. A temperature control device is installed on one side of the frame 1. The transparent water storage cavity 3 is filled with liquid, and the temperature control device is used to control the temperature of the liquid in the transparent water storage cavity 3.

[0024] As a specific implementation, the reactor 6 is made of sapphire material and protected by stainless steel 316 material on the outside. It is pressure resistant to 20 MPa and has an overall volume of 20 ml. A shaking ball is placed inside the reactor 6.

[0025] In one specific implementation, the vacuum unit consists of a vacuum pump, a mobile trolley, a buffer container, a vacuum gauge, and a venting device. The vacuum pump has a vacuuming rate of 50 L / min. The mobile trolley is installed on the top of the back plate 5. The vacuum pump is connected to the reaction vessel 6 through a pipeline.

[0026] In one specific implementation, the moving component includes casters 2, with at least four sets of casters 2 installed at the bottom of the frame 1, and a brake assembly is provided on the casters 2.

[0027] A two-degree-of-freedom multi-channel high-pressure visual swing test method, using the device described above, includes the following specific steps: S1. Disassemble reactor 6 and clean it three times with deionized water. Then dry reactor 6 until there is no moisture residue. Then reassemble reactor 6 according to the experimental requirements and set the water bath temperature to the target experimental temperature.

[0028] S2. The experiment is conducted at the target experimental temperature using a dual-degree-of-freedom multi-channel high-pressure visual swing test device, and relevant parameters are collected in real time. The performance of the inhibitor is evaluated based on the parameter data. The relevant parameters include at least temperature, pressure, and gas flow rate. The evaluation indicators of the inhibitor performance include gas consumption, water conversion rate, induction time, clogging time, and hydrate morphology.

[0029] S3. After the experiment, lower the water bath to allow the reaction vessel 6 to naturally return to room temperature. After the hydrate decomposes, open the exhaust valve to release the experimental gas, disassemble the vessel body for cleaning, and restore the experimental setup to its initial state.

[0030] As a specific implementation method, the experimental process specifically includes: 1. Cleaning and installation of reactor 6: Disassemble reactor 6 and clean it with deionized water, ensuring the cleaning process is repeated at least three times to remove any possible impurities. After cleaning, dry reactor 6 until no moisture remains. Then, reassemble reactor 6 according to experimental requirements and set the water bath temperature to the target experimental temperature.

[0031] 2. Injection: Different types and concentrations of inhibitor solutions and blank controls were added to each reactor 6 via syringes from one side, enabling parallel comparative evaluation under the same experimental conditions.

[0032] 3. Methane gas injection: Adjust the pressure reducing valve to an initial pressure of approximately 1 MPa, open the inlet valve, and inject 1 MPa of methane gas into the reactor 6. Perform three back-and-forth purging operations to eliminate air interference in the system and ensure that only methane gas participates in the reaction during the experiment.

[0033] 4. Set the experimental pressure: Slowly adjust the pressure reducing valve to the target pressure required for the experiment. After the pressure stabilizes, close the inlet valve and valve 6 of the reaction vessel to maintain system stability.

[0034] 5. Temperature control and dynamic experiments: The water bath is raised, and the temperature of reactor 6 is gradually reduced to the set value to ensure that the system is in a stable temperature control environment. The vertical swing angle and frequency, as well as the horizontal reciprocating stroke and frequency, are set. After the pressure stabilizes and the expected experimental conditions are met, the control system is started to make reactor 6 generate tumbling and shearing flow under two degrees of freedom to simulate the gas-liquid mixing reaction process.

[0035] 6. Data and Image Acquisition: During the experiment, a data acquisition system recorded key parameters such as temperature, pressure, and gas flow rate in real time. The data acquisition frequency was designed to accurately capture changes during the reaction process, especially critical time points for hydrate formation. Pressure data was plotted on a computer in real time for precise observation of pressure curve trends. A CCD camera was used to monitor the reaction process inside reactor 6 in real time. Using a transparent sapphire reactor 6 and a waterproof lighting system, image data of hydrate formation during the reaction was acquired. Image acquisition was performed using a high-resolution camera to ensure clear observation of the reaction.

[0036] 7. Post-experiment processing: After the experiment, the water bath was lowered to allow the reaction vessel 6 to naturally return to room temperature. After the hydrates decomposed, the exhaust valve was opened to release the experimental gases. The vessel was then disassembled and cleaned to restore the experimental setup to its initial state.

[0037] As a specific implementation method, the evaluation indicators for inhibitor performance include: 1. Induction time: By observing changes in pressure curves in real time and using a CCD camera, changes in pressure curve trends or the formation of hydrate particles can be observed to determine the induction time of different inhibitors and compare the inhibitory effects of different inhibitors.

[0038] 2. Hydrate stability: Whether hydrates remain stable under specific pressures and temperatures, and whether they readily decompose or depolymerize. The stability and depolymerization of hydrates are observed through pressure and temperature changes and image analysis.

[0039] 3. Inhibition effect and blockage time: By comparing experimental data from different concentrations of inhibitors with a control group under the same conditions, the effectiveness of inhibitors in delaying hydrate formation or inhibiting hydrate aggregation was evaluated. For example, at low inhibitor concentrations, hydrate aggregation and blockage can occur rapidly; the presence of blockage is determined based on solution flow and camera images, hindering gas-liquid mass transfer. When the inhibitor concentration is sufficient, hydrates are uniformly distributed in the solution as particles, forming a hydrate slurry, or even no significant hydrate formation occurs.

[0040] By comparing the differences in induction time, water conversion rate, clogging time, and hydrate morphology among different inhibitor systems, the performance of each gas hydrate inhibitor can be quantitatively and qualitatively evaluated, enabling rapid screening of different formulations.

[0041] 4. Gas consumption and water conversion rate: 1. Calculate gas consumption: At the start of the experiment, the initial pressure inside reactor 6 was recorded. P 0 and temperature T 0 and initial gas volume V 0,gas And based on the gas law, the initial number of moles of gas at the initial moment is calculated: ; in, Z 0 Indicates the initial gas compressibility factor. R Let J represent the gas constant, taken as 8.3144 J / (mol⋅K).

[0042] At a certain moment, the pressure inside reactor 6 is P t and temperature T t and the gas volume is V t,gas Then the remaining number of moles of gas can be expressed as: ; According to the law of conservation of mass, the number of moles of gas consumed is equal to the difference between the initial number of moles of gas and the remaining number of moles of gas, which can be expressed as: ; In the formula, and compression factor Z 0 and Z t For unknown parameters, the following formula can be used to obtain them: ; ; ; ; In the above formula, V k This indicates the volume of reactor 6, in cubic meters (m³). 3 ; V t,hydrate and V t,water This indicates the volume of hydrate formed and the volume of remaining water; α The coefficient of volume expansion is taken as 1.25; The water content number is taken as 6.0; M water and ρ water Let be the molar mass and density of water, taken as 0.018 kg / mol and 1000 kg / m³. 3 . P c and T c The critical pressure and critical temperature of methane are represented by 4.599 MPa and 190.6 K. The eccentricity factor is set to 0.012.

[0043] By combining the above equations, we can obtain the number of moles of gas at a certain moment: ; in, Let be the number of moles of gas at time t. The initial gas volume, The initial number of moles of gas at the initial moment. The molar mass of water, The density of water, R The gas constant is... Let be the temperature at time t. Let the pressure be at time t. The coefficient of volume expansion is 1. It is the water combination number. Let be the gas compressibility factor at time t.

[0044] ; in, Δn This refers to gas consumption. n0,gas The initial number of moles of gas. nt,gas Let t be the number of moles of gas at time t.

[0045] 2. Calculation of water conversion rate According to the stoichiometric relationship of hydrates: for every 1 mol of hydrate produced, 1 mol of gas and 6 mol of water are consumed. Therefore, the number of moles of water converted into hydrate is: ; The water conversion rate WC is equal to the ratio of the number of moles of water consumed to the known number of initial moles of water, that is: ; in, WC For water conversion rate, The number of water moles in the hydrate. The initial number of moles of water at the initial moment.

[0046] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0047] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A dual-degree-of-freedom multi-channel high-pressure visual swing test device, characterized in that, include: A frame (1) with a movable component mounted on its bottom; A transparent water storage chamber (3) is fixedly connected to the frame (1); The lifting mechanism (4) includes lifting columns that are symmetrically fixedly connected to both sides of the frame (1), and lifting components are installed on the lifting columns. An installation beam is provided between the two sets of lifting components. Back plate (5), which is mounted on the mounting beam by a horizontal displacement assembly; The reaction vessel (6) is provided with several groups of reaction vessels (6), and the several groups of reaction vessels (6) are rotatably connected to the back plate (5) through a swing connection assembly. Several groups of vertical swing assemblies are installed on the back plate (5). Several reaction vessels (6) located in the same vertical direction are rotatably connected to the vertical swing assembly through a telescopic drive shaft. A vacuum unit is installed on top of the back plate (5) for evacuating the reactor (6); A temperature control device is installed on one side of the frame (1), and the transparent water storage cavity (3) is filled with liquid. The temperature control device is used to control the temperature of the liquid in the transparent water storage cavity (3).

2. The dual-degree-of-freedom multi-channel high-pressure visual swing test device according to claim 1, characterized in that, The reactor (6) is made of sapphire material and protected by stainless steel 316 material on the outside. It is pressure resistant to 20Mpa and has an overall volume of 20ml. A vibrating ball is placed inside the reactor (6).

3. The dual-degree-of-freedom multi-channel high-pressure visual swing test device according to claim 1, characterized in that, The vacuum unit consists of a vacuum pump, a mobile trolley, a buffer container, a vacuum gauge, and a venting device. The vacuum pump has a vacuuming rate of 50 L / min. The mobile trolley is installed on the top of the back plate (5). The vacuum pump is connected to the reactor (6) through a pipeline.

4. The dual-degree-of-freedom multi-channel high-pressure visual swing test device according to claim 1, characterized in that, The moving component includes casters (2), and there are at least four sets of casters (2). The casters (2) are installed at the bottom of the frame (1), and a brake assembly is provided on the casters (2).

5. A method for a two-degree-of-freedom multi-channel high-pressure visual swing test, using the apparatus described in claims 1-4, characterized in that, include: Disassemble the reactor (6) and clean it three times with deionized water. Then dry the reactor (6) until there is no moisture residue. Then install the reactor (6) according to the experimental requirements and set the water bath temperature to the target experimental temperature. The experiment was conducted at the target experimental temperature using a two-degree-of-freedom multi-channel high-pressure visual swing test device, and relevant parameters were collected in real time. The performance of the inhibitor was evaluated based on the parameter data. The relevant parameters included at least temperature, pressure, and gas flow rate. The evaluation indicators of the inhibitor performance included gas consumption, water conversion rate, induction time, clogging time, and hydrate morphology. After the experiment, the water bath was lowered so that the reaction vessel (6) could naturally return to room temperature. After the hydrates decomposed, the exhaust valve was opened to remove the experimental gas. The vessel was disassembled and cleaned to restore the experimental apparatus to its initial state.

6. The dual-degree-of-freedom multi-channel high-voltage visual swing test method according to claim 5, characterized in that, The process of conducting the experiment at the target experimental temperature using a dual-degree-of-freedom multi-channel high-pressure visual swing test device specifically includes: Inhibitor solutions of different types and concentrations, as well as blank control solutions, are injected through multiple injection ports of the reactor (6); Methane gas was introduced into the reactor (6), and multiple flushing operations were performed to remove air. After adjusting the pressure inside the reactor (6) to the target experimental pressure and stabilizing it, the system is sealed. The water bath is controlled to cool the reactor (6) to the target experimental temperature. The two-degree-of-freedom swing mechanism is started to make the reactor (6) swing vertically and reciprocate horizontally at the same time to simulate the gas-liquid mixing and flow process.

7. The dual-degree-of-freedom multi-channel high-pressure visual swing test method according to claim 5, characterized in that, The formula for calculating the gas consumption at time t is: ； in, Let be the number of moles of gas at time t. The initial gas volume, The initial number of moles of gas at the initial moment. The molar mass of water, The density of water, R The gas constant is Let be the temperature at time t. Let the pressure be at time t. The coefficient of volume expansion is 1. It is the water combination number. Let t be the gas compressibility factor at time t; ； in, Δn This refers to gas consumption. n0,gas The initial number of moles of gas. nt,gas Let t be the number of moles of gas at time t.

8. The dual-degree-of-freedom multi-channel high-voltage visual swing test method according to claim 5, characterized in that, The formula for calculating the water conversion rate is: ； in, WC For water conversion rate, The number of water moles in the hydrate. The initial number of moles of water at the initial moment.

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